Ryutai Kogyo GTF, ATF, GTV and ATV variable area flowmeters provide direct visual indication of compatible liquid and gas flow.
The Ryutai Kogyo GTF, ATF, GTV and ATV Series provide direct visual indication of liquid or gas flow in a vertical pipeline. A float moves inside a transparent tapered tube, allowing the instantaneous flow rate to be read against the calibrated scale.
GTF and GTV use glass measuring tubes; ATF and ATV use acrylic measuring tubes. GTV and ATV provide PVC connection options for compatible piping systems. Choose the series, construction and scale to suit the fluid, operating conditions and pipe connection.
| Series | Measuring tube | Connection construction | Selection focus |
|---|---|---|---|
| GTF | Glass | Metal connection options | General process installations |
| ATF | Acrylic | Metal connection options | Normal-temperature applications |
| GTV | Glass | PVC-U; selected PVC-C configurations | Compatible chemical and pure-water piping |
| ATV | Acrylic | PVC-U | Compatible PVC piping at normal temperatures |
| Specification | GTF Series | ATF Series |
|---|---|---|
| Measuring tube | Glass tapered tube | Transparent acrylic tapered tube |
| Listed sizes for metal-flange versions | 10A–80A | 15A–150A |
| Measured fluids | Compatible liquids and gases | Compatible liquids and gases, including water and air at normal temperatures |
| Accuracy | ±2% of full scale | ±2% of full scale |
| Nominal measuring range | 10–100% of the selected full-scale value | 10–100% of the selected full-scale value |
| Operating temperature | Metal float: 0–100°C; PVC-U float: 0–50°C; PTFE float: 0–70°C. Other components may impose lower limits. | 0–40°C |
| Working pressure | Depends on size and construction; see the reference table below | Depends on size and construction; see the reference table below |
| Construction options | SUS304 standard; SUS316 and lined constructions available for selected configurations | SUS304 standard; alternative metal and PVC-U-lined constructions for selected configurations |
| Connections | Flanged or threaded configurations; specify size, standard and flange face | JIS 10K FF flange standard on the listed metal-flange version; other connections require confirmation |
| Installation | Vertical, bottom-to-top flow as standard | Vertical, bottom-to-top flow |
These are series-level selection details. Confirm the complete meter specification before ordering; ratings for one construction must not be applied to another.
GTF offers glass-tube flow indication with a choice of wetted materials, float designs and pipe connections. Suitable configurations accommodate higher fluid temperatures than the acrylic-tube ATF.
ATF provides local flow indication for compatible fluids at normal temperatures. Its acrylic tube and available larger sizes offer an alternative where the fluid, pressure and temperature suit this construction.
The illustrations show example configurations. Confirm dimensions, materials and options against the specification for the meter being supplied.
GTV combines a glass tube with PVC-U connections, rated 0–50°C. Selected PVC-C versions are rated 0–70°C. ATV combines an acrylic tube with PVC-U connections, rated 0–40°C.
Both offer ±2% full-scale accuracy, nominal 10:1 ranges and standard JIS 10K FF flanges. Working pressure depends on size and construction. Check all wetted materials, including seals, for chemical compatibility.
Ryutai identifies GTV with the earlier GTF PVC-connection version, and ATV with the earlier ATF PVC-connection version. These designations do not replace all GTF/ATF models. Confirm the complete order code and dimensions for replacements.
The following values are the maximum working pressures listed for the metal-flange series configurations. They are gauge pressures and do not override any lower limit imposed by the selected materials or operating conditions.
| Series | Nominal size | Maximum working pressure |
|---|---|---|
| GTF | 10A, 15A, 20A | 1.0 MPa gauge / 10 bar gauge |
| GTF | 25A | 0.8 MPa gauge / 8 bar gauge |
| GTF | 40A, 50A | 0.6 MPa gauge / 6 bar gauge |
| GTF | 65A, 80A | 0.4 MPa gauge / 4 bar gauge |
| ATF | 15A, 20A, 25A | 0.4 MPa gauge / 4 bar gauge |
| ATF | 40A, 50A, 65A, 80A | 0.5 MPa gauge / 5 bar gauge |
| ATF | 100A | 0.4 MPa gauge / 4 bar gauge |
| ATF | 125A | 0.3 MPa gauge / 3 bar gauge |
| ATF | 150A | 0.2 MPa gauge / 2 bar gauge |
A single meter is calibrated for a specified fluid and measuring range. The overall series coverage must not be treated as the measuring range of every meter.
Install the meter vertically in the specified flow direction and support the pipework to avoid strain on the measuring tube. Account for pressure surges and material compatibility. Acrylic tubes require particular care where solvents or cleaning chemicals may be present.
Contact Seacom with the fluid, flow range, operating pressure and temperature, pipe size and connection standard. For a replacement, include photographs of the existing meter, its scale and model marking so we can check the appropriate GTF, ATF, GTV or ATV configuration.
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Ryutai Kogyo PGH, GPB, GPC and AMF purge and panel flowmeters provide local flow indication for equipment and test systems.
Kofloc RK120XM Flow Meter for Gas Mixing combines two to four variable-area flowmeters into one compact unit for simple multicomponent gas mixing.
Each gas line has an individual inlet, calibrated flow scale and precision needle valve. The individually adjusted gases combine and leave through a common mixed-gas outlet.
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For new requirements or replacement enquiries, see the Ryutai Kogyo PGH Purge Flowmeter.
Contact Seacom to check your flow range, fluid, operating conditions and installation before selecting a replacement.
The Badger Meter ModMAG M2000 measures conductive liquid flow, with applications in data centre chilled-water and cooling-water systems. Communication options support integration with building and plant monitoring systems.
Ryutai Kogyo ADF and GDF water flowmeters provide direct visual flow indication for equipment and water piping.
The TOKICO PFA ultrasonic vortex flowmeter measures compatible chemicals, corrosive liquids and ultrapure water using PFA liquid-contacting construction.
The Ryutai Kogyo MCF and E-MCF references relate to earlier metal tube flowmeters and transmitters. This page supports existing instrument identification and replacement enquiries.
For current options, see the Ryutai Kogyo EM Series. Confirm the complete model, flow range, connections and electrical requirements before selecting a replacement.
The Ryutai Kogyo EM Series provides metal tube variable area flow measurement with local indication and optional electrical outputs.
Ryutai Kogyo GTF, ATF, GTV and ATV variable area flowmeters provide direct visual indication of compatible liquid and gas flow.
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GTF ATF Catalogue
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